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A sheet of paper can be read from almost any angle in a lit room, while a mirror only shows a bright reflection from one direction. What explains the paper's behaviour?
AThe paper absorbs every ray and re-emits fresh light
BThe paper refracts every ray instead of reflecting it
CThe paper's rough surface scatters rays in many directions
DThe paper follows a completely different law of reflection
Answer & Solution
Correct answer: C. The paper's rough surface scatters rays in many directions
1. A rough surface, such as paper, reflects light from different parts of the surface at different angles.
2. The rays then travel in many different directions, which is what is meant by diffused light.
3. Diffused light lets a reader see the page from almost any angle, since some rays travel toward every position.
4. The paper obeys the very same law of reflection as a mirror, so a different law is not the explanation.
_Source: OpenStax Physics (CC BY 4.0), Ch 16 "Mirrors and Lenses", section 16.1 Reflection_
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